Dustproof bearing



' DUSTPROOF BEARING- Filed May 19. 1950 INVENTOIZ: ERNEST BASEMAN.

BY ATTOIZ N EYS.

Patented May 24, 1932 e 'umeni m'r s ERNEST BASEMAN;

;oo 1 ANY LIMrrnnor 'roaonr 'on maio, CANADA DusTPRooF :BEABIN'G:

Application filed May 19,

soil. The clogging of the bearings prevents rotation of the discs sothat the wear of the discs is no longer uniformly distributed over theperiphery of the disc. Various devices 1 including spring-pressed metalrings have been proposed for the purpose of excluding the dust and dirtfrom the bearings but none of these proposals has been entirelysatisfactory. It is not usually commercially practicable to machine thebearings and metal rings, and it is not permissible to employ strongsprings to press the rings against the bearing, as this would stop orimpede the rotation of the discs and thus destroy the object of thedust-excluding devices.

The object of this invention is to provide an eflicient and durabledevice which Wlll exclude the dust from the bearing without affectingthe free rotation of the disc.

According to the present invention the foreign matter is successfullyprevented fIOIlI entering the bearing by a combination and cooperationof a washer of resilient material, such as felt, and a metal ring.

The invention consists in the construction,

combination and arrangement of parts hereinafter fully described andmore particularly pointed out in the appended claims,

Referring now to the accompanying drawings, which illustrate, by way ofexample,

convenient embodiments of the invent1on: Figure 1 is on the left-handside a front elevation of one form of the invention, and on theright-hand side a section on line 1-1 of Figure 2;

Figure 2 1s a section on line 22 of Figure 1, and

Figure 3 is a cross section of a modified form of the invention appliedto a double-disc seeding machine.

1930. Serial No. 453,752. r

F rononro, oiirARro, onimnanssienor :ro mAssnr-irannis- 1 Thecentralportionofiadisc is indicated at 1'. A hearing 2 ofany suitableconstrue tion iscoaxial with the discand is-secured thereto by means ofrivets 13$ 1 Rotatably mounted in the bearing 2 is the circular flange 4of a cylindrical supporting member 5whi'ch' isreduc'ed in diameter atitsouter end 6, the a latter being flattened a's at 7.

' The reduced end 6 is inserted into a (551*; respondingly' shaped hole:8 in a supporting arm 9 which is attached to the" seeder or other; 7

agricultural machine," not shown,- a washer IOand flanged; discll beinginterposed loetween the cylindrical'portion 5. and the arm 9: Abolt 12is screwed into a threadedbore in the member 5-6 and -clampstl1e 'flange4, washer 10 and disc 11to the arm 9.' Lubricant may v be inserted intothe bearing through a fitting '13 by way ofa passage 14in. the bolt 12.*I a vention, dust or other foreign matter is fprevented froin enteringthe bearing2 by the.

17, which is compressed between the ring 16f anddisc 11, The compressionof thespring 17is very slightasit is not permissible'to impose any unduefriction upon the bearing 2, asthe latter must be able to rotate freely.It is also important that the inner surface of ,7 According to theillustratedform of the inthering 16 be'bevelled with respect to the felti 1 washer 15. It will be seen from Figure 2 that the inner surface 18of the ring 16 tapers to- Q F wards the bearing 2. and at its smallerendis of slightly'smaller diameter than {the normal outer, diameter ofthe felt washer. Theinnen portion of the felt washer 15 is, thusslightly compressed and prevents ring 16 from mov-.

mg away from bearing. 2 without imposingany appreciable additionalpressure on the ring 16. .The ring .16 is thus, constantly pressedyieldingly against the bearing 2 bya combination of ,two forces, onedueto, the

1 "spring I I YThefring 16; is prevented,from rrotating;-

V l'l' and the other due to the compression of the washer 15. V d i Thering 16. also confines the felt washer 15 and holds it firmly in contactwith the cylindrical portion 5. The felt washeris preferably soaked withlubricant. 1

with the bearing 2 by any suitable means,

It is found that the combinatidn of. felt I washerandmetal ring arrangedasdescribed muddyground and does not appreciably afo Figure 3 shows theinvention applied to a doubledisc of a'known type. Correspondingorequivalent parts are indicated by the same reference numerals and" itis v believed "that this construction will i 7 without furtherdescription.

The illustrated forms of the invention. are

given-by Way of example'only, and m'odifica' f T tions. withinthe scopeof the appendedclaims may bo made without departingtrom the in-'Vention.

Iaclzum r :1 Incombinationwith"relatively rotatable r supporting andbearing members, means for vpreventing the en-try .of'; dust betweensaid 1 be clearly understood 1,860,306 I d a g] Y L dust-excludingengagement with-said washer and bearing, the washer slightly by thering.

5. Dust-excluding, means as claimed [in claim 4:, wherein a spring 'isslightly compressed between said disc andsaid ring. 7 g

16. Dust-excluding vmeams as claimed' n being compressed claim 4:,wherein the inner periphery of said ring is tapered toa diameterslightly smaller than the normal outer diameter-ofsaidwasher.

* In testimony whereof I have aifixed my signature.

mosteffectively excludes dust and dirt from i V theivinteriorof bearingfor anzindefinite pe- 5 IlQd,1eV-6Il if thedisc is used on sandy on I las feet the freedom of rotation of the disc. r

memberscomprising afeltwashersurround ing said-support and engaging saidbearing, and meta-l rmg'engagmgsaid bearing andhaving a taperedinnersurface in contact with,

, the outer periphery oi said washer.

V 2.. In combination} with relatively irotata able supporting andbearingmembersrm'eansfor preventingthe entry of dust between saidniemberscomprisinga felt washer. inzdustexcluding.-engagement'i with"both of said niembers-anda metal, ring n dust-exclud 'ing'engagementwithsaid washer and one of members, said ring being tapered where itengages said washer.-

Dust-excluding ;means'j as claimed inv. ola m2, wberelna lightcompression sprlng;

is pro-videdto .act on said ring; 7

4. In combination withthe disc of an agri-l cultural machine a.hollo-wcylindrical bearing rotatablewith.said'disc, a relati'yelystationarycylindrical supporting member pro- I d v jecting fromsaidbearing and haying a flange mounted: in said bearing, an; armcarrylng said supportingmember, a disc clamped between said arm and saidmember, a slightly 1 compressed felt washer between, said last nameddiscand bearing and in 'dust-excluding' engagement with said supporting memher and sa1d'ibear1ng,2and a'metal ringin

